sdpSemantics property not found crash

[leeqiangzi]

-[RTCConfiguration setSdpSemantics:]: unrecognized selector sent to instance 0x281ffc960

Specific location：

    public static func liveKitDefault() -> RTCConfiguration {

        let result = DispatchQueue.webRTC.sync { RTCConfiguration() }
        result.sdpSemantics = .unifiedPlan
        result.continualGatheringPolicy = .gatherContinually
        result.candidateNetworkPolicy = .all
        result.tcpCandidatePolicy = .enabled
        result.iceTransportPolicy = .all

        result.iceServers = [ DispatchQueue.webRTC.sync { RTCIceServer(urlStrings: defaultIceServers) } ]

        return result
    }

‘DispatchQueue.webRTC.sync { RTCConfiguration() }'，
No crash caused by sdpSemantics exists in the returned object；Is there any solution？，Call de exactly according to the document。

Thank you.

[davidzhao]

hi, which version are you running on? can you provide any repro steps?

[leeqiangzi]

The latest pod 1.0.6 updated yesterday

[leeqiangzi]

@objc class KSLiveKitManager: NSObject {
    override init() {
        super.init();
    }
    
    lazy var room = Room(delegate: self)
    
    /// 链接
    @objc
    func connect(url: String, token: String) {
        room.connect(url, token);
    }
    
    /// 离开房间，断开链接
    @objc
    func disconnect() {
        room.disconnect();
    }
}

extension KSLiveKitManager: RoomDelegate {

    func room(_ room: Room, localParticipant: LocalParticipant, didPublish publication: LocalTrackPublication) {
        
    }
    
    func room(_ room: Room, participant: RemoteParticipant, didSubscribe publication: RemoteTrackPublication, track: Track) {

    }
}

[leeqiangzi]

We are very anxious. We hope you can repair it as soon as possible. Thank you

[leeqiangzi]

pod 'LiveKitClient', '1.0.6'

[leeqiangzi]

Can you find the problem from the information I provided？

[hiroshihorie]

I'm investigating this, it might be Cocoapods related.
Can you give me the steps to replicate this ?

[leeqiangzi]

1. Use cocopods to manage, pod 'LiveKitClient', '1.0.6'
2. This problem will occur if you link directly with url and token
3. The specific tool code is as follows

@objc class KSLiveKitManager: NSObject {
    override init() {
        super.init();
    }
    
    lazy var room = Room(delegate: self)
    
    /// 链接
    @objc
    func connect(url: String, token: String) {
        room.connect(url, token);
    }
    
    /// 离开房间，断开链接
    @objc
    func disconnect() {
        room.disconnect();
    }
}

[self.liveManager connectWithUrl:kKSLiveKitUrl token:token];

The error is reported directly in the sdk

[leeqiangzi]

The main problem is why there is no sdpSemantics in the RTCConfiguration returned by the webRTC, leading to a crash when assigning values. We did nothing outside, which means we called the link

[leeqiangzi]

Hello, do you have any progress？

[leeqiangzi]

[hiroshihorie]

Are you using the ObjC version ?

[leeqiangzi]

ObjC or swift have problems

[leeqiangzi]

What I'm using now is to create a swfit class that calls livekit, and then calls swift with ObjC

[leeqiangzi]

I really don't understand what's going on. I've been looking forward to your reply

[leeqiangzi]

My code is ObjC, but you use Cocopods integration 1.0.6 to integrate, and use the bridge file to call swift

[hiroshihorie]

I can't reproduce this at the moment.

[leeqiangzi]

I will provide you with a Github demo later, about

[hiroshihorie]

Can I see your Podfile.lock file ?

[leeqiangzi]

• LiveKitClient (1.0.6):
  • Logging
  • PromisesSwift
  • SwiftProtobuf
  • WebRTC-SDK (~> 104.5112.05)
• Logging (1.4.0)
• Masonry (1.1.0)
• MBProgressHUD (1.1.0)
• MJExtension (3.2.2)
• MJRefresh (3.5.0)
• NTESVerifyCode (3.4.2)
• OpenSSL-TEG (1.0.0)
• PromisesObjC (2.1.1)
• PromisesSwift (2.1.1):
  • PromisesObjC (= 2.1.1)
• Protobuf (3.19.1)

[hiroshihorie]

Looks correct.... can you prepare a small demo ? thanks.

[leeqiangzi]

Hello, first of all, thank you very much for your reply. The reason for the problem has been found. It is because one of the other static libraries (. a) in our project references a lower version of webrtc. The 'RTCConfiguration' class in this version does not define the 'sdpSemantics' attribute
I also want to ask you whether we can still use LiveKit if a low version of WebRtc exists in the project and cannot be modified. Do you have a solution here

[leeqiangzi]

LiveKit is very important to us. Another library that references low version WebRtc is also important to us, but they can't modify it. We use LiveKit only for voice calls, and 'url' and 'token' are connected. Is there a better way to use LiveKit? For example, low version WebRtc is used in low version livekits, but only version 1.0.6 is seen in the current pod management

[leeqiangzi]

The lower version is probably the 2016 version of webrtc

[hiroshihorie]

Oh ok that makes a lot of sense it would crash.

You can fork this repo and reference your preferred WebRTC version and comment out the sdpSemantics property.

I'll close this for now since it's specific for your use case but I'm willing to continue support.

[leeqiangzi]

Hello, I'd like to ask, what is the minimum version of livekit supported on pod? At present, there is only one 1.0.6

[hiroshihorie]

@leeqiangzi I think you can use previous versions .